Lantern.



J. McDADE & F. F. DORSEY.

LANTERN.

APPLICATION FILED IAN. 22, 1915.

1,139,788. Patented May 18, 1915.

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tininn srnrns irnnisr erran EDWARD 3'. MGDABE AND FARNUM F. IDOBSEY, 6FNEW TUB-K, ASSIGNORS TO PRITGHARD-STAMPING- COMPANY?) OF ROCHESTER, NEWYORK, A CORPGRATION OF NEW YORK.

v LANTERN.

Specification of Letters Patent.

Patented inlay 18,1915,

Application filed January 22, 1915. Serial No. 3,817.

To all ill/20m it may concern Be it known that we, EDWARD J. MoDAon andFARNUM F. Donsny, citizens of the United States, and residentsof'liochester, in the county of Monroe and State of New York, haveinvented certain new and useful Improvementsin'Lanterns, of which thefollowing is a specification.

This invention relates to lanterns of the type commonly describedasrailroadlanterns, in which the currents of air "and of the products ofcombustion through the globe are controlled by passages in the body andin the head or dome of thelantern, without the employment of air-tubesfor equalizing the air-pressure at the top and bottom of the lantern. Inlanterns of the type in question considerable difficulty has beenencountered in properly controlling the air-currents within the globe insuch manner as to insure a sufficient supply of air for propercombustion, while at the same time avoiding the danger of drafts such asmay extinguish the flame under the exacting conditions of use. Tocontrol the indraft of air at the bottom of the globe it has beencustomary to mount the removable oil-font of the lantern in a hollowbody-portion in the form of a shell or ring, this body being, for atleast a part of its height, of sufficiently greater diameter than theoil-font to provide an annular air-space and being perforated for theadmission ofair to this space. From the air-space in question the airhas been delivered at, or adjacent to, the top of the coil-font throughopenings or passages of various forms more or less adapted to controland direct the air-currents. In lanterns of the type in question it iscustomary toemploy a globe of which the lower edge rests upon ahorizontal flat seat or ledge at or near the top of the Ian tern-body,this globe-seat extending into proximity with the top of the oil-font.It has been proposed, as in the United States patent to Hamm, No.910,673, to employ the globe-seat as means for regulatingthe inflow ofair at the top of the oil-font, this result being accomplished byextending the globe-seat into engagement with the" oilfont and providingthe globe-seat, at its inner margin with perforations for the passage ofthe air. This arrangement, however, causes the air-currents flowingthrough the perforations in question to be directed upthe top of theoil-font by arranging the oilfont with its top a short distance belowthe globe-seat, so that an annular space is provided between the upperangle or edge of the oil-font and the inner edge of the globe seat, butin this case the air-currents, while directed in a generally horizontaldirection toward the burner are not equally distributed around theburner, but may prevail in one direction or the other according as theair is admitted in greater volume at one side or the other of the bodyowing to wind or' to the lateral movement of the lantern in signaling. 7p v The object of the present'invention is to produce a lantern in whichthe inflow of air at the top of the oil-font shall be such'that the airis directed in the general direction of the flame of the lantern, but inwhich the flow of is equably distributed around the oil-font, so thatthe flame is subjected to no pronounced lateral draft in any direction.For the foregoing purpose we locate the globe-seat at a substantialdistance above the top of the oil-font, and provide a sleeve eX- tendingdownwardly from the inner edge of the globe-seat and to a point belowthe top of the oil-font. This sleeve is provided with a series ofperforations adjacent to the top of the oil-font, these perforationsbeing sufficient in number and size to admit the necessary quantity ofair, while at the same time the sleeve affords sul'licient obstructionto the fiow of air to causethis flow to be distributed substantiallyuniformly around the oil-font, so that under all conditions the airapproaches the flame of the lantern substantially uniformly from alldirections. Preferably, the diameter of the sleeve in question issomewhat greater than that of the oil-font, while its lower marginis'con air-currents passingthrough these openings to be broken up so asto result in a gentle i and diffused current of air toward the flame ofthe lantern.

The accompanying drawing is a vertical 7 sectional view of the lowerpart of a lantern embodying the present invention. r

The invention is'illustrated as embodied V in a lantern of a well-knowngeneral form,

this lantern' comprising .the usual sheet metal body 1 fixed in a wireframe or guard 2., The oil-font3 is of ordinary form, and is providedwith the usual open. burner 4, such as is adapted for useiwith theheavier illuminating oils. The lower part 5 of the 7 body is ,contractedto fit the oil-font closely and retain the oil font against lateralmovement, while the upper part of the body isof substantially greaterdiameter than the oil:

font so as'to provide an annular air-space 6." ingress of'air'tothisspace is permitted by the usual perforations ,7 in the wall'of the body.w

' 'The globe-seat is embodied in an annular member of drawn sheet-metal,having a vertical portion 9 1'itting'clos ely within, and

secured to, the upper margin of the body,

and a fiat inwardly-extending horizontal portion 8 which providesasurface'upon which the lower edge of the globe rests the usual manner.r

The novel features of the present construction reside particularly in asheet-meta] sleeve l0 which projectsdownwardly from the inner edge ofthe globeseat. This sleeve may be formedrand may be attachedto theglobe-seat, in any convenient'manner, but it is preferably produced fromthe same blank r and bythe'same stamping or drawing oper ation by whichthe globe-seat is produced,

- o being thus an integral extension fromthe oil-font into the spaceabove the oil-font,

'copies'of this patent may be obtained for inner-edge thereof: Thesleeve l0,'-as'shown,

extends for a short distance below the top ofthe oil-font, and isprovided, at the bottom, with a contracted or inwardly-projectso thattheair admitted to the air-space 6 through the opening? emerges into thelan vtern-globe throughtheholes 12 and in the general direction of theburner 4. c The im- 'Ypingeinent of apart of this air against the edgeof the oilfont,however, causes the aircurrents to be more 'or lessbrokenup and checked, while at the same time the obstruc-v tion of the spacebetween the globe-seat and the oil-font by the sleeve 10 prevents thefree flow of any pronounced lateral draft in the direction'of theburner. Accordingly, the burner is supplied with air from all directionsequally in such a manner that the adverse conditions.

We claim:

1. In a lantern, the'combination, with an flame will burn very steadilyunder the most oil-font and; a body in which the oil-font is removablymounted, the bodybeing of substantially greater diameter than theoil-font so as to provide an annular air-chamber,

and having openings for the admissionof air to sa d chamber, and a flatimperforate ledge, constituting a globeseat, partly clos-i ing the" topof the body and located above the top of the oil-font; of a sleeveextending' downwardly, from the inner margin of the globe-seat, andclose to the sides of the oil-font and provided with a series ofperforations, located partly above and partly below the upper extremityof the oil-font, forthe admission ofair from said air-chambertothespace, above the oilfont.

2. Ina lantern, the combination, with an oil-font and a body in whichthe oil-font is removably mounted, the body being of sub-v stantiallygreater diameter g'than the oilfont so as to provide an annular air-chamb er, and'having openings for the admission of air to said chamber, anda flat imperforateledge, constituting a globe-seat, partly closing thetop of the body and located above the top of the oil-font; ofa sleeve,or, substantially greater diameter than the oilfont, extendingdownwardly from the inner margin of the globe-seat, to a point below thetop of the oil-font, and thence inwardly into close proximity to theoil-font, said ingabove' the top of the oilfont, for the admission ofair from said air-chamber to the space above the oil-font.

- In testimony whereof we affix our signatures in presence of twowitnesses.

EDWARD J. MODADE. I FARNUM F; DORSEY.

VVitnessesi i V L. THoN, D. GURNEE.

five. cents each by addressing h Commissionerof Patents,

Washington, D. (7. r i I sleeve having a series of perforations, open

